67840010 has 24 divisors (see below), whose sum is σ = 142049700. Its totient is φ = 23259264.

The previous prime is 67840009. The next prime is 67840021. The reversal of 67840010 is 1004876.

It can be written as a sum of positive squares in 2 ways, for example, as 65820769 + 2019241 = 8113^2 + 1421^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68735 + ... + 69714.

Almost surely, 2^67840010 is an apocalyptic number.

67840010 is an abundant number, since it is smaller than the sum of its proper divisors (74209690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67840010 is a wasteful number, since it uses less digits than its factorization.

67840010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138470 (or 138463 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 67840010 is about 8236.5047198432. The cubic root of 67840010 is about 407.8451490084.

Adding to 67840010 its reverse (1004876), we get a palindrome (68844886).

The spelling of 67840010 in words is "sixty-seven million, eight hundred forty thousand, ten".